diff --git a/src/etc/inc/certs.inc b/src/etc/inc/certs.inc
index a424a9d2a..fef4d987a 100644
--- a/src/etc/inc/certs.inc
+++ b/src/etc/inc/certs.inc
@@ -40,7 +40,8 @@ function &lookup_ca($refid)
         }
     }
 
-    return false;
+    $false = false;
+    return $false;
 }
 
 function &lookup_ca_by_subject($subject)
@@ -94,6 +95,9 @@ function ca_chain_array(&$cert)
     if ($cert['caref']) {
         $chain = array();
         $crt = lookup_ca($cert['caref']);
+        if (!$crt) {
+            return false;
+        }
         $chain[] = $crt;
         while ($crt) {
             $caref = isset($crt['caref']) ? $crt['caref'] : false;
diff --git a/src/opnsense/mvc/app/library/OPNsense/Auth/Base.php b/src/opnsense/mvc/app/library/OPNsense/Auth/Base.php
index 6e23fffed..fef7ed1b9 100644
--- a/src/opnsense/mvc/app/library/OPNsense/Auth/Base.php
+++ b/src/opnsense/mvc/app/library/OPNsense/Auth/Base.php
@@ -284,7 +284,7 @@ abstract class Base
 
         $timeleft = $expected_time - ((microtime(true) - $tstart) * 1000000);
         if (!$result && $timeleft > 0) {
-            usleep($timeleft);
+            usleep((int)$timeleft);
         }
 
         return $result;